Machine for coating continuous strips of paper



(No Model.) 2 Sheets-Sheet 1. 0. & HLO. WOODWORTH.

MACHINE FOR COATING CONTINUOUS STRIPS .O F PAPER.

No. 409,892. Patented Aug. 27, 1889.

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0. & H. O. WOODWORTH. MACHINE FOR COATING CONTINUOUS STRIPS OF PAPER.

Patented Aug. 2'7, 1889.-

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UNITED STATES PATENT OFFICE.

OLIVER IVOODW'ORTH AND HENRY O. lVOODW'ORTI-I, OF NEWV LONDON, CONNECTICUT.

MACHINE FOR COATING CONTINUOUS STRIPS OF PAPER.

SPECIFICATION forming part of Letters Patent No. 409,892, dated August 2'7, 1889.

Application filed "aptembe: 8, 1888- gerial No. 284,959. (No model.)

To all whom it may concern:

Be it known that we, OLIVER WVOODWORTH and HENRY O. IVOODWORTH, both citizens of the United States, and residents of the city and county of New London, and State of Connecticut, have invented certain new and useful Improvements in Machines for Coating Continuous Strips of Paper or Fabric, which improvements are fully set forth and described in the following specification, reference being bad to the accompanying two sheets of drawings, in which Figure 1 is an end elevation of a machine embodying the said improvements. Fig. 2 is a detached plan view of the tank or pan that forms the reservoir for the coating material. Fig. 3 is an elevation of the principal parts of said machine from the rear or delivery side; and Fig. 4 is an enlarged view, in central cross-section, of the calendering, coating,

and distributing rollers, and illustrates, also,

the so-called scrapers, by means of which the surplus coating material is removed from the said rollers.

This invention has particular relation to machinery for coating one side of continuous webs of paper or fabric with such substances as asphaltum, maltha, tar, and analogous materialas, for example, in the manufacturing of building and waterproof papers.

Our object is to provide powerful mechanism that shall be under the complete control ofa single attendant, in which special provision is made for inserting the paper, for bringing the distributing-roller into operative engagement with the coating-roller, and for removing the surplus gum, so that a smooth and uniform coating is insured.

Referring to the annexed drawings, the numeral 2 indicates the main supportingframes of our machine, having journaled therein about midway of their height a coating-roller 3, said roller being form ed as a castiron cylinder, substantially like the calenderrolls of a paper-making machine. Immediately above said roller 3 is a companion calender-roller 4 of the same construction, but j ournaled in bearings 5, that are vertically movable in ways formed as integral parts of frames 2. Calender-roller 4, in addition to its own weight, is preferably also held in close engagement with roller 3 by a cam-shaft at the top of the frames, operated by a leverarm (5, connecting-arm 7, and weighted lever 8, as illustrated in Fig.1 of the drawings, this construction being common in this class of machinery, and one requiring no detailed description.

At the front side of the machine is an idleroll 9, and at the opposite or delivery side is a cylinder or roller 10, both the said roll and cylinder being located approximately at a level with the center of roller 4, so that as the web of paper (indicated by reference-numeral 11) approaches and leaves the coating-roller 3 said paper is kept from sagging, in which event it would im mediately stick to said coating-roller and be carried around by it and torn before it could be detached.

Located between frames 2 beneath the described rollers 3 and 4C is a pan or tank 12, in which the coating substance is placed. The flooring of said tank is largely covered by pipes 13, through which a current of steam is passed when the machine is in use for the purpose of heating the coating substance, and so reducing its consistency that it may be thinly distributed.

Hung in hearings in tank 12 immediately beneath roller 3 is a roller 14, whose lower portion is in the mass of coating material, and whose upper side is adjacent to but not in contact with said roller 3, except at certain times, hereinafter specified. Tank 12 rests at the front end on the floor, or on a blocking 15, and at its opposite end is capable of being raised a distance sufficient to bring the perimeter of the distributing-roller 14 into contact with the perimeter of the coating-roller 3. The elevating of said tank and roller may be accomplished with an ordinary pinch-bar and piece of blocking, if desired; but I have illustrated and prefer to use a simple and inexpensive device, consisting of a shaft 16, hung on the lower side of said tank, having an operating-handle 17, projecting upward within easy reach, and having also atieach end camlevers 1S, projecting downward and forming supports for said tank. When it is desired to raise the tank and its attached roll 14:, the han die 17 is grasped and carried outward, caus ing the cam-levers 18 to ride along the floor, gradually raising the end of the tank until the several connected parts assume the positions indicated by dotted lines in Fig. 1.

The mechanism for imparting power and motion to the described rollers is illustrated in Fig. 3. The shaft that supports the coating-roller 3 carries a gear 10, that meshes with a corresponding gear 20 on the shaft of calender-roller 4. Said coating-roller shaft also has on an end that projects beyond frame 2 a second gear 21 of considerable size, that is driven bya smaller gear 22 on a shaft 23, journaled instands 24. On saidshaft 23 is adriving-pulley 25, connected by belt 26 with a counter-shaft in the usual manner. A clutch is provided on shaft 23, consisting of a fixed section 27 and a companion section 28, moving with pulley 25, said clutch-sections being thrown into and out of engagement by means of an operating-lever handle 29. It will now be understood that motion may be imparted from shaft 23 to the coating-roller 3, and thence to the calender-roller 4.

The distributing-roll 14 is revloved by a gear 30, located outside the tank 12. This gear is in the same vertical plane as the gear of the coating-roller 3, and meshes with said coating-roller gear when the tank is elevated in the manner above described.

The calender-roller 4, coating-roller 3, and the delivery-roller 10 should be formed as cylinders, and kept heated by a current of steam, and the distributing-roll 14 may be so constructed, if desired; but it is not absolutely necessary that the last named roll be so formed. It is also not essential that the system of piping here illustrated be strictly followed, as it is immaterial how the connections are made so long as the tank and several cylinders are provided with a current of steam.

We have here shown a main pipe 31. leading from the generator to a point near one of the frames 2, where branch pipes 32 and 33 lead to the ends of the hollow journals of rollers 3 and 4, connections being made with said journals by screw-caps and stuffingboXes in themanner usual in calenderingmachines.

From pipe 32 a branch 34 leads to the delivery-cylinder 10, where connection is made in the same manner. Similarlyconnected pipes are provided at the opposite end of the machine to dispose of the exhauststeam, which passes off through pipe 35.

In working asphaltum, maltha, and other substances that gum up on cooling we have found in practice that such coating material is inclined to accumulate and become lumpy on the perimeter of the roller 14 as it is carried upward toward the coating-roller 3, and to prevent the unequal coating of the paper which would then result we provide a scraper or evener, formed of a pipe 30, that is parallel with roller 14 and in contact with it when said roller is raised. This pipe-scraper is supported atits ends by angular bends that extend around and rest on the rear side of the main frames 2, one end of said scraperpipe being connected with the steam-pipe 34, above described, by a pipe 37, thus receiving a continuous current of steam. This heated pipe 36, lying in contact with roll 14, when said roll is elevated heats and levels all of the lumps and partially-cooled coating substance, and causes it to pass to roller 3, and thence into contact with the web of paper evenly distributed. As a further safeguard against the introduction of. gritty substances or lumps, we provide a flat scraper 38, adjacent to but not in actual contact with roller 3, said scraper being supported by a bar 39, secured by screw-bolts 40 between the upright frames 2.

In practically operating our described machine the coating material is first placed in tank 12 and steam introduced through pipes 13 to reduce said material to a flowing consistency. Steam is also introduced through pipes 31 to the several cylindrical rollers. Tank 12 is then raised until its roll 14 is brought into engagement with roller 3. Assuming that power and motion have been applied to said roller 3, the roll 14 begins to rotate and carries upward from the tank a portion of the coating material which is transferred to and distributed over the circumference of the roller 3, and thence goes to the calenderroller 4, which also becomes coated. When the coating material has been sufficiently warmed to secure an even distribution, the tank and its roll 14 are lowered. Rollers 3 and 4 continue to rotate, each being lightly coated. A roll 41 of paper is now placed in bearings 42 and the end of the web carried upward over a guide-roll 43, thence over the idle-roll 9, already referred to, and is then carried downward and entered between rollers 3 and 4. As said paper appears at the other side, it is taken in hand and carried upward over the heated delivery-roll 10, and thence is led a considerable distance to a suitable reeling-machine. The passage of the first few feet of paper removes from rollers 3 and 4 the coating material first deposited thereon, and leaves said rollers clean. The tank and distributing-roll 14 are then raised and the coating material is again supplied to the roller 3, but cannot reach the upper roller 4 on account of the interposed web of paper. That portion of the end of the paper that is coated 011 both sides is torn off, and the single-coated web is attached to a reel and rolled up as fast as finished.

WVe have found it almost impossible to start the end of the paper through between rollers 3 and 4 when the distributing-roll 14 is raised and the coating material spread thickly over the several rollers, for the reason that said paper is held so tightly to one or the other of said rollers by suction that it.(the paper) is ITO from flowing over the edges of the paper and reaching its top side. The result is a continuous web evenly coated on one side, while the opposite side or face remains its normal color.

Having described our invention, we claim as new and wish to secure by Letters Patent 1. In combination, the supporting-frames 2, a pair of superimposed rollers journaled in said frames, a tank, a distributing-roll journaled in said tank adjacent to the lower roll of said pair, as set forth, cams 18, and oper ating-lever 17, attached to said tank, as described, by means of which the tank may be raised, all being substantially as and for the purpose specified.

2. In combination, three superimposed rollers, the lower one of the series being j ournaled in a vertically-movable tank, intermeshed gears on the shafts of said rollers, a verticallymovable tank beneath the lower roller, as set forth, a tubular scraper parallel with and in contact with the perimeter of said lower roller when the latter is raised, and a steampipe connected with said scraper, and devices for raising the tank, all being substantially as and for the purpose specified.

3. In combination, three superimposed rollers and a vertically-movable tank, as set forth,

the lower one of the series of rollers being journaled in said tank, a cylindrical roller located at or about the level of the upper roller of the series, a tubular scraper parallel with and in contact with the perimeter of said' lower roller when the latter is raised, steampipes leading to said cylindrical roller and to said tubularscraper, and cam and lever mechanism, as described, for raising the said tank and its attached roller, all being substantially as and for the purpose specified.

4. In combination, in a coating-machine of the class referred to, the following elements: three superimposed rollers and a verticallymovable tank, as set forth, the lower roller of the series being journaled in said tank, a cylindrical delivery-roller 10, located at about the level of the upper roller of the series, a tubular scraper parallel and in contact with the lower roller when the latter is raised, steampipes leading to and connected with the two upper rollers of the series, to the deliveryroller 10, and to the said tubular scraper, as set forth, intermeshed gears on the shafts of said superimposed rollers, and driving and raising mechanism, substantially as described, connected therewith.

OLIVER IVOODIVORTII. HENRY O. \VOODVORTH.

Witnesses:

FRANK H. ALLEN, A. KINGSBURY. 

